Plate for cooling apparatus.



v No. 892,109. PATENTED JUNE 30, 1908.

R. ALBXANDER-KATZ 8: A. KARFUNKEL. PLATE FOR COOLING APPARATUS.

APPLICATION FILED JAN. 21, 1907.

' UNITED STATES PATENT OFFICE.

RICHARD ALEXANDER-KATZ, OF CHARLOTTENBURG, AND ALFRED KARFUNKEL, OF BERLIN, GERMANY:

PLATE FOR COOLING APPARATUS.

To all whom it may concern:

. Be it known that we, RICHARD ALEXAN- DER-KATZ', and ALFRED KARFUNKEL, both subjects of the King of Prussia, and residing at Charlottenburg, near Berlin, Germany, and Berlin W., Germany, respectively, have invented certain new and useful Improvements in Plates for Cooling Apparatus, of which the following is a specification.

This invention relates to a hollow metal plate combining great strength with light ness and with specific properties enabllng it to be used for many purposes in building, machine construction and in cooling appa ratus. g

The improved late com rises twoapamllel' members of thin s heet meta l punched at small and regular intervalsso that short, tubular bosses project therefrom. The bosses pro-, jecting from one of these members are of somewhat smaller diameter than the bosses of the other member, the, difference between the diameters being ap roximately equal to twice the thickness oft e metal. The membersthus prepared are placed together so that the narrower bosses are op osite the Wider bosses, and are then owerfuilypressed towards each other so t at the bosses of larger diameter.

drawing by means ofexamples, Figures -1- and 2. being resipectively an elevation and a cross-section o a portion of a plate constructed inthe manner described; Figs. 3 and 4 are respectively a front view'and crosssection of a motor-car radiator. consistingof and groups of hollow plates placed at an angle relatively to each other.

- In Figs. 1 and 2 a and a represent the two sheet metal members, and b and c, the smaller larger bosses respectively forming the com isite' plated. T e composite plate described possesses reat strength and durability relatively to its gulk and weight, since the bosses act as stays ,F

Specification of Letters Patent.

paths afforded to the cooling agent. efficiency of the apparatus isprobably supe- Patented June so, 1908.

Application filed January 21, 1907. sen-um. 353,317,

and the parallel sheet metal members oppose great resistance to bending strains. The strength of the plate is greatly increased by soldering the joints between the bosses. The pgope'rties possessed by the plate enable itto used with great advantage in .all structures in which the combination of strength with lightness is essential, as for exam le in motor-cars and air-ships. Another a vantage of the plate lies in the large surface area thereof relatively to the space occupied; this advantage is more particularly of value for the construction of cooling apparatus, and the like. The immersion of the plate in molten metal renders the joints between thetubular bosses watertight and steam-tight.

Very efficient cooling-apparatus for ex losion-motors, brewing purposes and the ike can be constructed as shown in Fig. 3 by arranging a group of parallel hollow plates d, produced in the manner described, in communication with a Water supply conduit 6 and discharge conduit f common to alt-,th'e

plates.

The efficiency of the apparatus is improved if the plates (1 are so placed that the tubular ducts inconsecutive plates are not in line with each other, so that the cooling agent, for example cold air, alternately flows Y through the ducts and impinges on the walls of sheet metal. This arrangement'of the ducts is, for example, secured by placing the platei in the inclined positions lllfi'strated in 1 it is obvious that exce tionally good cooling effects are obtainab e by reason of the large cooling surface available, the rapid transfer of temperature due to the thinness of the sheet'metal, and the multiplicity I(13f T e rior to that of any cooling apparatus hitherto known.

What we claim as our invention and desire to secure by Letters Patent of ,the'United States is I 1. A hollow metal plate consisting 'of parallel members of sheet metal, and a plurality of uniformly distributed tubular bosses punched out of each of said members, the

osses of the one member being somewhat smaller than and fitting within the bosses of thit iither member, and the outer edges of said larger bosses being in contact wlth the inner face of the member carrying the smaller bosses substantially as set forth.

A hollow metal plate consisting of parallel members of sheet metal, and a plurality of uniformly distributed tubular bosses pu ched out of each of said members, the bosses of the one member being somewhat smaller than and fitting Within the bosses of the other member, the outer edges of said larger bosses being in contact With the inner fare of the member carrying the smaller bosses, and a layer of sealing metal disposed over tl1e entire plate substantially as described.

3. Cooling apparatus comprising in combination plurality of hollow metal plates each consisting of parallel members of sheet metal, and a plurality of uniformly distributed tubular bosses punched out of each of said members, the bosses of the one member being somewhat smaller than and fitting Within the bosses of the other member, the outer edges of said larger bosses being in con- -tact with the inner face of the member carrying the smaller bosses and fluid supply and discharge conduits in communication With said plates substantially as described.

4. Cooling apparatus comprising in combination a plurality of hollow metal plates each consisting of parallel members of sheet metal, and a plurality of uniformly distributed tubular bosses punched out'of each of said members, the bosses of the one member being somewhat smaller than and fitting Within the bosses of the other member, the outer edges of said larger bosses beingin contact with the inner face of the member carrying the smaller bosses, and a layer of sealing metal disposed over the entire plate and fluid supply and. discharge conduits in communication With said plates substantially as described. y

In Witness whereof we have signed this specification in the presence of two witnesses;

RICHARD AIJEXANDERTKATZ. ALFRED KARFUNKEL.

Witnesses HENRY Hasrnn, WOLDEMAR HAUPT. 

